Coinbase customers can now borrow USDC at a fixed interest rate against their bitcoin, after the exchange integrated Morpho Midnight, a fixed-rate and fixed-term lending protocol running on its Base network. The launch arrives as Coinbase’s existing variable-rate borrowing service, powered by Morpho Blue, passes more than 1.4 billion USD in outstanding loans secured by nearly 3 billion USD in collateral. The new product gives eligible users a choice between two onchain credit structures: the variable-rate loans they already know, and fixed-rate loans that lock in both the interest rate and the maturity the moment a borrower accepts an offer.
How Coinbase's fixed-rate borrowing works
The mechanics follow the pattern Coinbase established with its earlier Morpho-powered rollout. Customers pledge bitcoin, which Coinbase converts into cbBTC — an ERC-20 token backed one-for-one by bitcoin held in its custody — and transfers it to a Morpho smart contract on Base. The borrower receives USDC without selling the underlying bitcoin exposure. The difference is in the terms. Under Morpho Midnight, introduced in July for fixed-term lending on Base, lenders submit offers through an onchain order book and borrowers select from the available rates and maturities. Each loan establishes its interest rate and repayment date at inception, removing the possibility that borrowing costs drift higher before the loan is repaid — the core risk of variable-rate borrowing through Morpho Blue, where rates adjust as the amount of USDC supplied and borrowed changes. Coinbase currently offers maturities at the end of the current month or the following month, and a company spokesperson clarified that “End of Month” means the last Friday of the selected month. The deadline is not cosmetic: borrowers must repay the USDC before the agreed date, or the lender can claim the cbBTC posted as collateral under the loan’s terms. “Coinbase Borrow gives our customers access to liquidity without having to sell their assets, and fixed-rate borrowing gives them even greater choice over how they manage that credit,” said Jacob Frantz, Coinbase’s yield and investments product lead.
Morpho's intent-based design keeps lender capital working
Midnight’s architecture differs from the pooled model most DeFi users know. Rather than depositing into a shared pool with an automatically changing rate, lenders and lenders-to-be set conditions covering the interest rate, maturity and counterparty requirements. Crucially, lenders do not need to park funds in a separate market while waiting for a match — their capital can remain in variable-rate Morpho Blue markets until a fixed-rate offer is accepted, at which point the required liquidity moves into the matched loan. The early numbers show the fixed-rate market is still in its infancy. Midnight holds roughly 30 million USD in deposits during the initial rollout, a fraction of Morpho Blue’s wider footprint: approximately 5.2 billion USD in outstanding loans and 16 billion USD in deposits across all integrations. Coinbase’s 1.4 billion USD loan book covers only the activity accessed through its own interface. Fixed-rate demand has been slower to materialize elsewhere in the Morpho ecosystem, too. Data from Sept. 18 showed five Coinbase stock-backed lending markets had attracted 54,652 USD in USDC borrowing — all through variable-rate pools — while the same tokenized stocks, including Apple, Alphabet, Nvidia, Meta and a token tied to privately held SpaceX, had 95 Midnight markets with different maturity dates but zero outstanding fixed-rate loans.
Collateral risk does not disappear with a fixed rate
For U.S. customers, the appeal is straightforward: dollar liquidity without a taxable sale of bitcoin. Coinbase first brought the Morpho-powered borrowing model to most U.S. states in 2025, with New York excluded from the initial rollout. But fixing the interest rate does not fix the market risk. Morpho’s system enforces loan-to-value limits, and a position can be liquidated if the debt rises past the permitted threshold relative to the collateral’s value. A sharp decline in bitcoin’s price can therefore trigger liquidation even while the interest rate on the loan stays exactly where the borrower locked it. There is also a structural difference in how the two products treat time. Existing variable-rate loans through Morpho Blue have no fixed maturity and can remain open indefinitely as long as the position stays within its required collateral range. Fixed-term borrowers face a stated deadline instead — a feature for anyone planning around a known cash-flow event, and a hard constraint for anyone else.
Coinbase keeps building both sides of onchain credit
The fixed-rate launch is one piece of a broader credit push. Coinbase has also built the lender side of the market, letting customers supply USDC through Morpho; during September it expanded that service into Brazil, where eligible customers can deposit the stablecoin into a Steakhouse Financial-curated vault. The Brazilian product generates variable returns from borrower demand and has attracted nearly 500 million USD in deposits, with no fixed lock-up period on withdrawals. Morpho has said Midnight’s architecture may eventually support structured credit and lending against tokenized real-world assets, although any additional markets would require separate integrations — a roadmap that would put the protocol, and Coinbase’s distribution, closer to mainstream fixed-income rails. For now, the message to borrowers is choice: variable-rate liquidity with no deadline, or a fixed rate with one. Either way, the collateral is bitcoin — and at press time bitcoin trades at 85,958 USD, up 5.9 percent on the day, with Ethereum at 2,751 USD and Solana at 117 USD, meaning every cbBTC-backed position carries the same market risk it always did, fixed rate or not.
Fixed rate borrowing against btc with no taxable sale is the use case this industry promised for a decade. 3 billion in collateral says people finally get it.
3 billion sounds big until you remember one bad btc day liquidates a chunk of it. the LTV limit line near the end is the real story here.
cool product but ny still excluded from basically everything coinbase ships. third year of this
1.4B outstanding vs 3B collateral and they barely sent a tweet about it. coinbase really does ship this stuff in silence lol
Fixed rate and fixed term onchain is genuinely useful. Variable rates on Morpho Blue are fine until a spike hits mid-loan and your LTV blows out
Agreed, and fixed maturity solves the refinancing risk. My only concern is what happens to lender capital if borrowers default en masse during a crash, the intent model is still young.
the intent-based lender side is the underrated part. your capital waits at your terms instead of sitting in a pool eating whatever rate the market gives you
lenders setting their own terms and just waiting is such a better model than pool rates moving under you. morpho been cooking
1.4B in outstanding loans against 3B collateral on a product most people have never heard of. base quietly building a real credit market